First of all searching for that person would be pointless. They did not have the clear Blue where that person went and also that person could really have some kind of teleportation techniques so everyone of those warriors decided to not to search for that person. With that everyone of them decided to go back to the kingdom and already told the human King.
Naturally the human king was happy that all of them were safe but at the same time he did not tell the reinforcement to come back because he already told them instead of this person the reinforcement will be in charge of searching around the danger zone if they find any clue they should immediately take action.